Khurais will produce 1.2 million barrels a day, which is about 1.5% of world demand (per the IEA). The IEA also conservatively estimates in the most recent World Energy Outlook that demand will grow at 1.2% per year worldwide.

Basically, we need the equivalent of 1+ Khurais each year, just to keep up with world oil demand growth. Sound like a challenge?

Alternatively, see what Forbes wrote about the Haynesville Shale...enough natural gas to last a decade...